Finding the Fourth Proportional to 9,631.56, 13,291.55 and 5,382.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,631.56 : 13,291.55 = 5,382.79 : x
2. Step 2: Convert to fraction form
   9,631.56/13,291.55 = 5,382.79/x
3. Step 3: Cross multiply
   9,631.56x = 13,291.55 × 5,382.79
4. Step 4: Simplify right side
   9,631.56x = 71,545,687.51
5. Step 5: Solve for x
   x = 71,545,687.51/9,631.56
6. Step 6: Final answer
   x = 7,428.26